Description
n8n versions before 2.39.6 and 2.40.0 before 2.40.1 contain a credentials leak vulnerability in the Wekan and Baserow username-and-password credentials that sends unencrypted passwords to unvalidated hosts. Attackers with credential update permissions can modify the host field to receive account passwords at arbitrary hosts, bypassing domain validation controls.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| n8n-io | n8n | < 2.39.6, 2.40.0 – < 2.40.1 | 2.39.6 |
Advisories 1
- WID-SEC-2026-3393 n8n: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 1, 2026
References
- GitHub Security Advisory (GHSA-gx6g-2hm7-c4xf) vendor-advisory
- VulnCheck Advisory: n8n before 2.39.6 and 2.40.x before 2.40.1 Credentials Leak via preAuthentication Hook third-party-advisory